|Pew Research map; click on it to enlarge it.|
In the counties with the greatest growth in exports, "booming U.S. oil and gas production and higher precious-metals prices have turbocharged export growth in many resource-rich counties. In 17 of the 30 counties with the highest annualized real export growth rates between 2003 and 2016, the economic sector that contributed the most to that growth was mining, oil and gas extraction," DeSilver reports.
Canada and Mexico are the two biggest destinations for U.S. exports, so a change in the U.S.'s trade relationships with those countries could hurt rural America. The NAFTA renegotiation talks are ongoing, but have been granted an extension after negotiators have had a hard time meeting stringent American demands.